Shaving machine



y 1942- s. F, BAHR j "2,282,539 I smwine MACHINE I Filed Au 25, 1938 ZO-J INVENTOR Gusia e17 Ba??? ATTORN Patented May 12, 1942 UNIT SHAVINGMACmNE Gustave F. Bahr, Fairfield, Conn, assignor to Casco ProductsCorporation, Bridgeport, Comm,

a corporation of Connecticut Application August 25, 1938, Serial No.226,656

5 Claims.

This invention relates to dry shavers, and, more particularly, to thetype in which there isan outer slotted member and a cooperating innermember to shear off hairs projecting through the slots.

In devices of this kind where the head or outer member is provided withslots which extend through a rather sharp corner thereof so as to bepartly in the face-engaging part of the head and partly in the side wallso that hairs, especially long hairs, can enter the slots with greaterease and facility and also permit closer shaving of flat portions as thecheek and lip of a person, difficulty has been encountered, due to theloose skin, especially on the neck of the user entering the. slotsthrough the sharp corner and side wall and being cut by the cuttingmember.

An object of the present invention is to provide a cutting head'havingthe slots in the faceengaging portion and side wall thereof in which'theskin of the user is held against entry into the hair-receiving slots,while the hairs are free to pass therein and to be severed.

With the improvement of the present inven-.

tion, the neck and other parts having loose skin may be shaved with asmuch facility and dispatch as the firmer skin portions of the face.

In the broader aspects of the invention, a protecting means surroundsthe side walls of the cutter head to hold the skin in spaced relationthereto, but it is provided with openings adapted to permit the hair topass therethrough and into cutting relation with the movable blade.

In the preferred form of the invention, the protecting means surroundsthe side wall and is provided with a smooth skin-engaging surface havinghair-receiving openings which correspond to and are aligned with theopenings in the head so that while the skin is held by the skin-engagingportion from entering the openings in the head the hairs, especiallylong and superfluous hair,

may readily pass into cutting relation with the cutter blades.

Further, the protecting means of the present invention is constructed soas to become a part of the head, and serves as the means for mountingthe head upon the casing. This is accomplished by forming the protectingmeans, as a band or ing means and head together as a unit in assembledrelation. 5 i

The protecting band with the cutter head secured thereto is threaded orotherwise secured to the casing, and is preferably provided with meansfor properly positioning the cutter head with respect to the innercutter blade so that they will always be in proper cooperating relation.

Other features and advantages of the invention will be apparent from thespecification and claims when taken in connection with the drawing, inwhich:

Figure 1 is a top plan view of the cutter head and guard.

Fig. 2 is a longitudinal sectional viewof the cutter hea'd and'guard,and the mounting means.

Fig.3 is a transverse sectional view taken along line 3-3 of Fig. 2. i

Fig. 4 is a transverse sectional viewtaken along cured thereto at thereduced neck portion [5 of the collar. The hollow casing surrounds thedrive shaft to which a cutter blade I1 is coupled for rotationtherewith, the cutter blade having a plurality of cutting surfaces l8projecting therefrom at an angle to the radius thereof as shown in Figs.3 and 4.

The specific cutter blade and coupling means illustrated in the drawingis described and claimed in copending application Serial No. 226,655,filed August 25, 1938. In this construction, the cut ter blade is fixedto a coupling I9 of insulating material and the coupling is slidablymounted on the end of the drive shaft and has a suitable drivingconnection therewith. The coupling andcutter blade are normallyurged'outwardlyv along the shaft so as to be pressed into engagementwith the undersurface of the'cutterhead when the razor is assembled.

The casing h'as'a'fixed circular cutter head 20 mountedthereon so as toenclose the cutter blade. The headismade of thin metal orthe likematerial, and is provided with a plurality of hairreceiving apertures 2!through whichhairs project to be severed by the cutting surfaces whichengage the inner surface of the cutterhead.

The apertures in the head may be of any desired the side edges thereofbeing spaced from the side walls. The operative surfaces of the cutterblade being at an angle to the radius of the blade will also be at anangle to the slots in the head and will sweep across the slots to shearoff the hairs.

The portions of the slots in the side wall of the head permit the hairsto pass readily into the slots in the face-engaging portions and intothe path of the cutter blades where they are severed by the action ofthe rotating blades against the inner edge of the slots of theface-engaging portions. As shown in Fig. 4, because of the position andangle of the blade, it will first close the open end of the slot in theface-engaging surface adjacent the side wall, and will prevent hairswhich have. passed into the slots through the slots in the side wallsfrom escaping and insures that they will b severed.

While the slots in the side walls of the head readily permit hairs toenter, they will also permit loose skin, as found on the neck and underthe chin of the face, to enter and become pinched or cut by the rapidlyrotating blades. To prevent the skin from entering the slots and frombeing pinched, the present invention provides improved means for spacingthe skin from the side walls of the cutter head, while permitting thehairs to pass into the slots. This means in the preferred form of theinvention comprises a ring or band 24 of metal or other suitablematerial which is adapted to surround the side walls of the cutter headas shown in Fig. 2. The band or ring is provided with a smoothface-engaging surface 25 which can be readily moved over the skinwithout irritating or chafing.

According to the invention, the ring is provided with hair passages oropenings 26, preferably slots, spaced at intervals therearound so thatthe slots can be aligned with the slots in the head as shown in Fig. 1.When the slots in the head and ring have been aligned as shown, the ringand head are clamped together to form a unit.

Preferably, this is accomplished by providing the bottom of the sidewalls of the head with an outwardly projecting flange 2'1 and the ringis provided with a shoulder 28 which abuts one face of the flange andlocates the ring with respect to the face-engaging portion of the cutterhead. The ring or band projects rearwardly as at 29 beyond the head andis internally threaded as shown in Fig. 2. A locking ring 30 is threadedinto the band and into engagement with the other surface of the flangeto clamp it against the shoulder of the band. The locking ring can beprovided with suitable recesses 3| to receive a spanner wrench or othertool whereby it can be moved into locking relation. Thus the protectingring and head become locked together as a unit to be mounted on thecasing so as to cooperate with the rotating blades.

While the ring and head can be mounted on the casing in anydesiredmanner, the preferred form of the invention utilizes therearwardly extending portion of the band for this purpose. As is'clearlyshown in Fig.- 2, the internal threads therein are threaded on the openend of the outwardly flared casing ll so as to secure the assembledunit' thereto to enclose and cooperate with the rotating blade.

To properly position the. head with respect to the blade, thecasing isprovided with an outwardly projecting flange 33 which engages a recess34 formed in the end'of the ring to limit its inward movement. When theflange is seated in the recess, the head will have been moved intoproper cutting relation with the cutting blade.

With the head and ring surrounding the blade and secured to the casing,the shaving device can be moved over any part of the face, and theprotecting ring will hold the skin away from the sharp edge and theslots in the side wall and thus prevent the skin from passing throughthe slots and being pinched. However, the slots or hair-receivingpassages in the ring will permit the long hairs to pass into the slotsin the faceengaging portion through the slots in the side wall wherethey will be engaged by the rotating cutting surfaces and severed.

Variations and modifications may be made within the. scope of thisinvention and portions of the improvements may be used without others.Iclaim:

1. In a dry shaving device, a casing; an apertured cutter plate having aface-engaging portion and side walls depending therefrom provided withan outwardly extending flange; a protecting member surrounding the sidewalls and having a shoulder for engaging one face of the flange; alocking member positioned within the protecting member and movable intoengagement with the other face of the flange to lock the plate andprotecting member together, the protecting member extending beyond thelocking member and forming a means whereby the cutter plate is attachedto the casing.

2. In a dry shaving device, a casing; a circular cutter plate havingafaceengaging portion and side walls depending therefrom provided withan outwardly extending flange, the cutter plate being provided withradially disposed slots extending through the face-engaging portion andside walls thereof; a protecting ring surrounding the side walls andhaving a shoulder for engaging one face of the flange, said protectingring preventing the skin of the user from contacting the slots in theside walls and having a plurality of openings aligned with the slotswhereby hairs may pass into the hair-receiving slots; and means withinthe protecting ring for engaging the other face of the flange to lockthe plate and protecting ring together, said protecting ring projectingbeyond the locking means and forming a means whereby the plate issecured to the casing.

3. A cutter head unit for a dry shaver comprising an apertured cutterplate having a faceengaging portion and side walls depending therefromprovided with an outwardly extending flange; a protecting membersurrounding the side walls and having a shoulder for engaging one faceof the flange; and a locking member positioned within the protectingmember ,and movable into engagement with theother face of the flange tolock the plate and protecting member together.

4. A cutter head unit for a dry shaver comprising a circular cutterplate having a face-engaging portion and side walls depending therefrom,said side walls provided with an outwardly extending flange, saidc'utter plate having radial hair-receiving slots extending through thefaceengaging portion and side walls; a protecting ring surrounding theside walls and having a shoulder, for engaging one face of the flange,said protecting ring having hair-receiving slots to correspond with theslots in the side wall of the cutwith the other face of the flange tolock the plate and protecting ring together.

5. In a dry shaving device, a casing; a circular cutter plate having aface-engaging portion and side walls depending therefrom provided withan outwardly extending flange, "the cutter plate being provided withradially disposed slots extending through the face-engaging portion andside walls thereof; a protecting ring surrounding the side walls andhaving'a shoulder for engaging one face of the flange, said protectingring preventing the skin of the user from contacting the slots in theside walls and having a plurality of openings aligned with the slotswhereby hairs may pass into the hair-receiving slots; and a lookingmember positioned within the protecting ring and movable into engagementwith the other face of the flange for locking the plate and protectingring together, said protecting ring projecting beyond the locking meansand forming a means whereby the plate is secured to the casing.

' GUSTAVE F. BAHR.

